Fig. C.1

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Exponent for the power functions approximating the total gas production of 67P/C-G, 81P/Wild 2, and 103P/Hartley 2 (from top to bottom) as a function of heliocentric distance. L1, L2, and L3 represent the thicknesses of the dust layer in Model B, composed of dust particles with a size of 10−4 m. The left and right columns correspond to pre- and post-perihelion conditions, respectively.
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